Bearing assembly of hub of bicycle

Abstract

A bearing assembly of a hub of a bicycle includes a receiving ring formed with an tapered inclined face and a catch flange; a roller bearing mounted in the receiving ring and including a plurality of rollers arranged in a tapered manner; a cover ring including a rigid plate formed with a locking flange rested on the catch flange, and a rubber layer coated on the rigid plate; and a positioning bolt head including a lower tapered urging portion, and an upper positioning portion. The lower tapered urging portion is urged on the rollers of the roller bearing to push the rollers to press the inclined face, such that the receiving ring, the roller bearing, and the positioning bolt head are combined with each other in a press-fit manner without detachment.

What is claimed is:  
     
       1. A bearing assembly of a hub of a bicycle comprising: 
       a receiving ring ( 21 ) having an inner wall formed with an inclined face ( 23 ) arranged in a gradually tapered manner, a catch flange ( 22 ) formed in said inner wall of said receiving ring ( 21 );  
       a roller bearing ( 31 ) mounted in said receiving ring ( 21 ) and including an annular body ( 33 ) arranged in a gradually tapered manner, and a plurality of rollers ( 32 ) mounted in said annular body ( 33 ) and arranged in a gradually tapered manner;  
       a cover ring ( 41 ) secured in said receiving ring ( 21 ) and including a rigid plate ( 42 ), and a rubber layer ( 44 ) coated on an outer periphery of said rigid plate ( 42 ), said outer periphery of said rigid plate ( 42 ) formed with a locking flange ( 43 ) extended downward and rested on said catch flange ( 22 ) of said receiving ring ( 21 ); and  
       a hollow positioning bolt head ( 51 ) mounted in said receiving ring ( 21 ) and including a lower tapered urging portion ( 52 ), and an upper positioning portion ( 53 ), said lower tapered urging portion ( 52 ) urged on said plurality of rollers ( 32 ) of said roller bearing ( 31 ) to push said plurality of rollers ( 32 ) to press said inclined face ( 23 ) of said receiving ring ( 21 ), such that said receiving ring ( 21 ), said roller bearing ( 31 ), and said positioning bolt head ( 51 ) are combined with each other in a press-fit manner without detachment.  
     
     
       2. The bearing assembly of a hub of a bicycle in accordance with  claim 1 , wherein said upper positioning portion ( 53 ) of said positioning bolt head ( 51 ) defines at least one positioning recess ( 54 ), a locking member ( 64 ) is attached to said upper positioning portion ( 53 ) of said positioning bolt head ( 51 ) and is formed with at least one locking lug ( 65 ) secured in said at least one positioning recess ( 54 ), a hub ( 61 ) is rotatably mounted on a shaft ( 62 ) and has two ends each mounted with a locking member ( 64 ) and a bearing assembly that includes said receiving ring ( 21 ), said roller bearing ( 31 ), said cover ring ( 41 ), and said positioning bolt head ( 51 ), and said shaft ( 62 ) has two ends each in turn extended through said bearing assembly and said locking member ( 64 ) and each engaged with a nut ( 66 ). 
     
     
       3. The bearing assembly of a hub of a bicycle in accordance with  claim 1 , wherein said lower tapered urging portion ( 52 ) of said positioning bolt head ( 51 ) has a bottom face formed with a protruding block ( 55 ) protruding outward from a bottom of said receiving ring ( 21 ), an annular groove ( 56 ) is defined in an outer periphery of said protruding block ( 55 ), and said bearing assembly further comprises a snapping member ( 57 ) secured in said annular groove ( 56 ) and rested on said bottom of said receiving ring ( 21 ). 
     
     
       4. The bearing assembly of a hub of a bicycle in accordance with  claim 3 , wherein said snapping member ( 57 ) has an outer diameter greater than an inner diameter of said bottom of said receiving ring ( 21 ). 
     
     
       5. The bearing assembly of a hub of a bicycle in accordance with  claim 3 , wherein said snapping member ( 57 ) is a C-shaped snap ring. 
     
     
       6. The bearing assembly of a hub of a bicycle in accordance with  claim 1 , wherein said receiving ring ( 21 ) has a bottom formed with a bottom annular face ( 24 ) extended radially inward therefrom.